public class Example21 {
    public static void main(String[] args) {
        int sum1=add (1,2);
        int sum2=add (1,2,3);
        double sum3=add(1.2,2.3);
        System.out.println("sum1="+sum1);
        System.out.println("sum2="+sum2);
        System.out.println("sum3="+sum3);
    }
    public  static int add(int x,int  y) {
        return x + y;
    }
    public  static int add(int x,int y,int z) {
        return x + y + z;
    }
    public  static double add(double x,double y) {
        return x + y;
    }
}
